Amplifying receiver



Nov. 2U, 3923. A/

H. G. LEACH ET AL AMPLIFYING RECEIVER Filed April 26, 1922 2Sheets-Sheet l NGV. 2u, 115923. 31,474,973

H. G. LEACH ET AL AMPLIFYING RECEIVER Filed April 26, 1922 2Sheets-5heet 2y mvfwatow P36 Henry Leach "re-naaien new; ae, reale. I

j ramera are rentrant orties.

G. LEACE AND ASIIEIPHS. LEACE, F BROOKLYN, NEW YQRK.

PLIFYING RECEVER.

appimuonmea April ae, i922. seriai no. seas/ia.

To all wlwmzt may concern Be it known that we,'-HENRY G. LEAoH andJOSEPH S LEACH, citizens of the Unitedl States and Great Britain,respectively, and

`residents of Brooklyn, in the county of Kings and State of New York,have in- -vented certain new and useful Improvements -in AmplifyingReceivers, of which the following is a specification.

'The invention relates to so-called loud with the reception of radiosignals and the like, or for thet-ransmission of phonographicallyreproduced sounds. llt has for its object, in a device of this type, toprovide for the adjustment of the receivinginchanism in accordance withvariations in the operating current such, for example,'as may be.

produced by tube voltage changes. A further object of the inventionconsists in means for setting the adjusting device and for regulatin thetension on the operating arm of the adgjusting means.

The nature of the invention, however, will best be'unders'tood whendescribed in oonnection with the accompanying drawings, in.wl1ich 1 is afront elevation and Fig. 2 is lFi a sidi. elevation of a loud-speakerembody.

a horn' or other'suitable resonator of` wellblown or special design andwhich it is preferred to employ with the receiver, the horn then beingsecured in a base 11 made hollow to encase the receiver mechanism, asshown.

'Base 10 is provided at its lower portion with a slit 12 or elongatedopening into the in-A terior of the base and thru which is inserted 'forlimited oscillation therein an operating handle 13 for the tensionadjuster of the receiver diaphra.

At the upper portion of the base and in proximity to its end is mountedthe receiver diaphragm 15 of any well-known or special te; and againstthe same is tensioned,

- ,t the attraction of an ature 16 by for regulating the degree oftension between diaphragm and lever.

.For example, the entire receiver mechamsm is encased and carried by a;container 2O mounted for limited reciprocation in the upper portion ofthe base 11, suitable leads 21 from external binding posts 22 beingconnected with the receiver mechanism in the container 20. IContainer issupported in the base 11 by means of an axial stud 23 projectingdownwardly therefrom, the same being surrounded by a sleeve 24externally threaded and held to the stud by a cap 25 and between thelatter and the bottom of the container 20. Sleeve 24 works in a threadedopening of a cross-bar 26 and in a similar opening of a bridge 27, `thebar 26 being secured to the base 11 and the bridge 27 to the bar 26.Between the cross-bar and bridge and embracing the sleeve 24 isl aforked member 28 with threaded jawsto fit the sleeve to which it may belocked by means of a screw 29 passing thru the outer ends of the jawmembers. The inner end of arm 13, moreover, is secured to the forkedmember 28 so that movement of the former Will be reproducedin the latterto oscillate the sleeve 24. Uscillation of the latter thus effects areciprocation of the container 20 to vary the tension between the lever18 and its associated diaphragm 15 in accordance with the current, orrather voltage, conditions; and renders thereby a more satisfactoryreproduction of the sound.

lit will be appreciated, however, that this adjustment is limited to theextent of oscillation of the arm 13. Should it be desired to reset sameto change the initial tension, this may conveniently be accomplished bymerely loosening the screw 29 to remove the tension of the jaws of fork28 upon the sleeve 2a and thus permit of freely moving the former withreference to the latter, whereupon the jaws maya ain be tightens@3 and anew, but similar, e'gree of adjustment is available. Moreover, it mayoccur that the movement of the arm 13 is too loose or too tight to Suitthe taste of the particular operator; and provision is made to vary thetension thereon as by an adjusting screw ECD illlO 3l.) which passesthru the bridge 27 and `works into the cross-bar 26, so that in draw--tro-magnetic means mounted therein to actuate said diaphragm andincluding a tensioned lever contacting therewith, a stud extending fromsaid container, an externally threaded sleeve mounted about said stud, acap holding same thereto and between itself and the container, a forkedmember embracing the sleeve to rotate same, and threaded means engagingthe sleeve and secured to the base.

2. An electrica-l amplifying receiver, comprising a hollow base memberwith opening the-rein, a diaphragm mounted'in the base, a cont-ainerreciprocable in-said base, electro-magnetic means mounted therein toactuate said diaphragm and including a tensioned lever contactingtherewith, a stud extending from said container, an externally threadedsleeve mounted about said stud, a cap holding same thereto and betweenitself and the container, a forked member embracing the sleeve to rotatesame, threaded means engaging the sleeve and secured to the base, and anarm secured tothe forked member and extendingr thru the opening of thebase and beyondsame.

3.l An electrical amplifying receiver, coinramera prising a hollow basemember with opening therein, a diaphragm mounted .in the base, acontainer reciprocable' in said base, electro-magnetic means mountedtherein to actuate said diaphragm and including a tensioned levercontacting therewith, a stud extending from said container, anexternally threaded sleeve mounted about said stud, a

capi holding` same thereto and between itself i 4. An electricalamplifying receiver, comi prising a hollow base Imember with openingtherein, a diaphragm mounted in the base, a container reciprocable insaid base, electro-magnetic means mounted .therein to actuate saiddiaphragm and including a tensioned lever contacting therewith, a studextending from said container, an externally threaded sleeve mountedabout said stud, a cap holding same thereto and between itself and thecontainer, a forked member embracing the sleeve to rotate same, means tolock and release the forked member to said sleeve, and threaded meansengaging the sleeve and secured to the base.

Signed at New York, in the county of Kings and State of New York, this22nd d-ay of April, A. D. 1922.

HENRY e. LEAoH. JOSEPH s. LEAoH.

